JPH04245926A - Method and device for treatment for discharging decisive amount of fiber floc per unit time - Google Patents

Abstract

PURPOSE: To provide a treating method and apparatus capable of delivering a predeterminate quantity of fiber flocks per unit time at a lower cost and at a high treating accuracy in a treating process of spinning raw materials. CONSTITUTION: A pair of feeding apparatuses (18, 20) are placed so that a feeding gap is formed beneath a tower-type feeder (16), one (20) of the feeding apparatuses is pressed (76) to the other feeding apparatus (18), and also it can move with the pressure of fiber flocks (62). The minimum width of the feeding gap (x) is predetermined. The surface speeds (u) of the driven feeding apparatuses (18, 20) are controlled so that the product of the width between the feeding apparatuses (18, 20) and the surface speed is kept constant at least in mean value.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention utilizes two feeding devices disposed below a tower-type feeder to form a feed gap to discharge a determinable amount of fiber flocs per unit time. The present invention relates to a processing method and a processing device.

0002

BACKGROUND OF THE INVENTION A method or device of this type is known, for example, from British Patent Specification No. 35172, which corresponds to Swiss Patent Specification No. 313355. A similar method and device is known from DE 37 13 590 A1, in which an additional opening device is arranged below the two feeding rollers forming a feeding device. Other known examples include German Patent Specification No. 196821,
German Patent Specification No. 3151063 and Japanese Patent No. 6
No. 2-263327 is known.

[0003] Normally, in producing yarn, different types of fibers are mixed, ie, fibers differing in origin, fiber type, quality, color, etc., to create a blended fiber population. These fiber masses are then carded and subsequently conveyed to a spinning process. For example, a blend of fibers can be created by loading different types of fibers into each tower feeder and then depositing them onto a conveyor belt using multiple feed rollers positioned below each tower feeder. Ru. In this way, a plurality of successively laminated layers are formed on a conveyor and then conveyed onto an opening roller, which then opens individual fiber flocks from the laminated fiber mass, Ensures opening of different fibers in different layers. Determination of the desired proportions of the individual fiber components is accomplished by controlling the speed of the individual feed rollers.

Efforts have been made to control the filling height of fiber flocs in individual tower feeders, such as by keeping the filling height of the tower feeders approximately constant; Efforts have been made to set the rotational speed of the feed rollers to a predetermined value, or to process each desired fiber layer on a conveyor belt.

[0005]

These known processing methods and processing apparatuses are only successful to a limited extent in achieving their respective predetermined throughputs. Devices known to date do not take into account the relatively imprecise and variable nature of fiber flock density, packing height and degree of opening. Automatic hopper feeders are recommended to address the aforementioned inaccuracies, where the individual components are weighed before the fibers are blended. However, this equipment is relatively expensive.

[0006]The problem at issue here is therefore that high processing accuracy at low manufacturing costs can be achieved without the need for predetermining a precise filling height in the column feeder. The goal is to develop methods and devices for this purpose. In order to fulfill this task, the feeding device is formed by two rotating feeding rollers running in opposite directions,
At least one of these two feed rollers is pressed in the direction of the other feed roller and is movable away from the other feed roller under the pressure of the fiber flock; The interval or a value proportional to the interval is measured, and the rotational speed of at least one of the supply rollers and the product (n x) of the rotational speed (n) and the interval (x) are constant at least in the average value. An unpublished patent application proposes a treatment method which has the characteristic of being controlled so that it is maintained. Regarding the device, one axis of the two supply rollers is supported in a reciprocating motion toward and away from the other supply roller, and the two supply rollers are pressed together in the direction of the axis of the other supply roller. A travel recording device is provided for determining the spacing in the fiber flock transfer operation between the feed rollers or a value proportional to this spacing, and a plurality of pulses are measured on the basis of the determined spacing to achieve a predetermined value of instantaneous production. A device has been proposed in unpublished European Patent Application No. 0102745.8-2314, which is provided with a control device for controlling the rotational speed of the feed roller.

[0007] The purpose of the invention is to propose another solution to the above-mentioned problem.

[0008]

According to the invention, a method and a device for achieving the object of the invention are proposed in claim 4. The invention is based on the solution that the above-mentioned problem can be achieved not only by using a second feed roller, but rather when the feed device consists of one of the configurations a to f below.

a. a rotating supply roller and a slide opposite the roller; b. a rotating supply roller and a driven or free-running circulating endless belt opposite the roller; c. two freely moving circulating endless belts facing each other, at least one belt being driven and the other belt either freely rotating or being driven; d. a driven endless belt and a slide opposite the belt; e. a rotating feed roller and a freely moving rotating feed roller disposed opposite the roller; f. A rotating supply roller and a supply gutter member facing the roller.

[0010] At this time, in the supply devices having all the configurations a to f, the supply gap converges to the minimum width, and at least one of the two supply devices is pressed against the other supply device. and one of the feeding devices is movable under pressure of the fiber flock from the other feeding device in order to change the spacing between the two feeding devices to change the minimum width (x) of the feeding gap. , the minimum width between said two feeding devices or a value proportional to said minimum width is determined, and the surface speed (u) of the driven feeding device or both feeding devices is determined by the width between the feeding devices and the surface speed. The product is controlled to remain constant at least at its average value.

[0011] Regarding the apparatus, the solution described above is applied to the supply apparatus having any of the configurations a to f below. a. a rotating supply roller and a slide opposite the roller; b. a rotating supply roller and a driven or free moving endless belt opposite the roller;
c. two freely moving circulating endless belts facing each other, at least one belt being driven and the other belt being either free to rotate or driven;
patrol belts, d. a driven endless belt and a slide opposite the belt; e. a rotating feed roller and a freely moving rotating feed roller disposed opposite the roller; f. A rotating supply roller and a supply gutter member facing the roller.

[0012] At this time, in all of the feed devices having the configurations a to f, the feed gap converges to the minimum width, and at least one of the two feed devices is directed in the direction of the other feed device. A pressing device is provided for pressing the fiber flock in advance, at least one of the two feeding devices is movable from the other feeding device under the pressure of the fiber flock, and during the operation of moving the fiber flock, the two feeding devices A travel recording device is provided which determines the spacing between the devices to a minimum spacing position or to a value proportional to said minimum spacing to a predetermined nominal value (m'nom) of the instantaneous production volume (m). A control device is provided for controlling the surface velocity (u) of the movable feeder based on a distance (x) determined to obtain control of the movable feeder.

Further preferred developments of the above-described method and device according to the invention are claimed in claims 2 and 3 and in claims 5 to 9.

The following formula given by the inventors in a non-public application may be used with other values as the constant K, and instead of the rotation speed (n) of the feed roller, the surface speed of the driven feed device is has been found to be effective for other types of feeding devices, even if inserted.

[0015]

[Math 2]

By further developing the inventive concept, the object of the invention is also achieved by the following solution. That is, it is assumed that the supply device has any of the configurations a to g below. a. two rotating feed rollers facing each other; b. a rotating supply roller and a slide facing the roller, c
．． a driven feed roller and a driven or free-running circulating endless belt opposite the roller; d.
two freely moving circulating endless belts facing each other, at least one belt being driven and the other belt either freely rotating or being driven; e. a driven endless belt and a slide opposite the belt; f. a rotating supply roller and a freely moving rotating supply roller disposed opposite the roller; g. A rotating supply roller and a supply gutter member facing the roller.

[0017] At this time, the relative positions of the two feeding devices are determined by instantaneously measuring the force (P) or a value proportional to the force that moves the two feeding devices facing each other apart. The surface velocity of the driven feeder is kept substantially constant and the product of surface velocity and force (
u·P) is controlled so that it is constant at least as an average value.

Regarding the device, the solution described above is applied to a device in which the supply device has any of the configurations a to g below. a. two rotating feed rollers facing each other; b. a rotating supply roller and a slide facing the roller, c
．． a driven feed roller and a driven or free-running circulating endless belt opposite the roller; d.
two freely moving circulating endless belts facing each other, at least one belt being driven and the other belt either freely rotating or being driven; e. a driven endless belt and a slide opposite the belt; f. a rotating supply roller and a freely moving rotating supply roller disposed opposite the roller; g. A rotating supply roller and a supply gutter member facing the roller.

In this case, for all the configurations of the feed devices a to g above, the feed gap converges to the minimum width and the relative positions of the two feed devices are adjusted for the selected production volume (m'nom). , at least substantially constant relative to each other, a dynamometer is provided for measuring the force (P) tending to separate the two feeding devices from each other, and a predetermined value of the instantaneous output (m') is provided. A control device is provided which controls the speed of the driven feeder in order to obtain a determined force for the nominal value (m'nom).

European Patent Application 90102745.8-23
Based on equation (1) given in 14, the density of the fiber flock placed in the feeding gap is taken into account. We have proposed that an equation having the same form as equation (1) can be used when the working space between two feeders is kept constant and a change in this space results in a changed force of the feeder. I found out what I can do. This force is proportional to the density of the fiber flock stream traveling through the feed gap. Therefore, the formula is changed as follows.

[0021]

[Math 3]

In the above equation, u is the surface velocity of the driven feeder and p is the force mentioned above. Also, K is a constant, but equation (1) and unpublished European patent application No. 901102
745.8-2314.

[0023]

EXAMPLES In order to more clearly illustrate the present invention, FIGS.
The description will be repeated with reference to FIG. 8, and then embodiments of the present invention will be described based on FIGS. 9 to 16.

[0024] In each embodiment, the same members are given the same reference numerals, and when there is a difference from the members already described, the numbers below the decimal point are given to distinguish them.

The mixing device shown in FIG.
0 and three sets of identical blending processing devices (hereinafter referred to as processing devices) 12 arranged in a row above the conveyor belt 10.
It consists of As will be explained in more detail later, all processing equipment includes a tower-type feeder 14 equipped with an observation window 16, two or three feed rollers 2, 3 disposed below the tower-type feeder 14, and Consists of opening rollers. The available fiber flocs in the tower feeder, the upper limit of which is indicated at 24, are fed by feed rollers 18 rotating in respective directions of rotation 26, 28.
, 20 and transported out through the feeding gap formed between these two rollers. A fiber opening roller 22 that rotates at a higher speed than the supply rollers is arranged downstream of these supply rollers. The collected fibers are fed via conduit 30 to the top surface 34 of the conveyor belt.

Other loose fiber flocks 32.1 and 32.2 from the other two processing devices are placed on top of the first layer formed from fiber flock 32 and are indicated by arrows 36.
Conveyor belt 34 toward the right-hand side of the mixing device in the direction of
conveyed by the top surface of the Another rotating conveyor belt 38 rotating in the direction of arrow 40 is arranged as shown in FIG. . As a result, the three fiber layers 32, 32.1 and 32.2 are compressed and then captured in the feed nip between the two rollers 44,46. The supply rollers 44, 46 feed the stacked fiber group thus formed to the opening roller 48 rotating in the direction of arrow 50, whereby the fiber flocs loosened from the stacked fiber group are sent to a tower. After passing through the feeder 52, it is transferred to the downstream process. Contaminants and fallen cotton separated using the opening roller 48 are collected in a cotton dropping chamber, and are removed using an air stream if necessary.

Naturally, the number of processing devices 12 is not limited to three, as shown in the embodiment of FIG. can do.

A more detailed example of the supply rollers 18, 20 and opening roller 22 is shown in FIG. The two side walls 56, 58 of the tower feeder extend close to the surfaces of the feed rollers 18, 20 and converge slightly toward each other so that fiber flocks are not packed together. The fiber flocs 12, which have been significantly opened in the tower feeder 12, are removed and compressed into a fiber floc mass 62 by feed rollers 18, 20 rotating in opposite directions as indicated by arrows 26, 28. Opening roller 22 opens a plurality of fiber flocks from this fiber flock population 62, which move toward the conveyor belt in the direction of arrow 64. All the fiber flocks removed by a pair of feed rollers rotating at a speed n are conveyed through a feed nip having a width x. The width x of the feed gap indicates the minimum distance between two feed rollers, and the width of the feed gap corresponds to the length of the feed rollers, ie the width of the side wall of the tower feeder.

The axis of supply roller 18 is indicated at 66, the axis of supply roller 20 is indicated at 68, and the axis of opening roller 22 is indicated at 70. The shaft 66 of the supply roller 18, like the shaft 70 of the opening roller 22, is fixed to the tower type feeder without movement. However, the shaft 68 of the supply roller 20 is supported by two arms 72 (only one shown in FIG. 2). The other arm is arranged on the other end surface of the supply roller 20 in the same manner as the arm 72 shown in FIG. These arms 72
is rotatable on the axis of the opening roller 22, so that a rotational movement on the axis 70 as shown by the double-headed arrow 74 can be performed. As can be easily seen from FIG. 2, this rotational movement makes it possible to change the gap x.

On the right side of FIG. 2, a pressing device 76 using a compression spring 78 is provided, one end of the device 76 is fixed to a head 80 on the tower feeder, and the other end is connected to a head 82 connected to the arm 72. placed in Rod 84 is head 8
0 and the head 82, and this rod 84 extends between the head 82 and the head 82.
The length can be adjusted by moving inward. Of course, a second pressing device is likewise provided at the other end of the supply roller 20. Therefore, the two springs 78 act to reduce the gap x. The minimum gap is arm 7 as shown.
is predetermined by a stop device 86 acting on 2. Another stop device 86 is provided for the arm 72 at the other end of the feed roller 20.

The position of the gap x is determined by the pressure determined by the mechanism itself, the density and spread of the fiber flock, and the action of the force of the spring 78. The size of the gap x can therefore be determined by the degree of insertion of the rod 84 into the head 82, with the rod 84 and the head 82 being formed as a measuring instrument.

The processing method according to the invention and the control method used will be explained below with reference to FIG. First, the following definitions are introduced. m: mass t: time m': mass flow = relative production of processing equipment = mass/
Time v': Volume flow = Volume/Time rho = Material density n = Rotational speed of supply roller u = Circumferential speed (surface speed) of supply roller d =
Diameter of the supply roller l = Length of the supply roller x = Width of the opening in the supply gap (variable) A
= cross-sectional area of the feed gap = l x S = transfer time mass flow equals output per unit time. m'= v'・rho Based on the above definition m'= v'・rho=V/t・rho=(
A・S)/t・rho=(l・x・S
)/t・rho m =(l・x・u・t)/
t・rho=l・x・d・pi・n・rho where rho is the material density in the feeding gap, and rho is
Since it is pressed with a substantially constant force, it is at least substantially constant. Since d, pi and l are also constant, rho・d・pi・l=K, therefore m'=dm/dt=K・n・x i.e. dm=K・n・x・dt Calculated from this formula The following formula is obtained.

[0033]

[Equation 4] Furthermore, the production amount between time t2 and t1 can be obtained from the following formula.

[0034]

[Math 5] The above t2-t1 can be arbitrarily selected.

As shown in the graph of FIG. 3, the mass m corresponds to the area under the curve during the time interval t2 - t1. As a result, m indicates a value determined at this time interval. The rotation speed of the supply roller is controlled in the following manner. First, the opening cross-sectional area is determined and then integrated with a constant rotational speed n1, the speed of which is measured over the time interval t2 - t1, resulting in a production volume m1 per hour. This value is compared with the nominal production quantity mnom and the rotational speed is controlled in such a way that a new rotational speed n2 is generated and this new rotational speed n2 is kept constant for the next time interval.

This process is repeated for each time interval,
The control thereby immediately sets the desired average production value m'nom. The calculation itself is carried out by a microprocessor, which stores certain parameters and is informed of the continuous measurement results of the travel recording device 82 and the supply rollers 18, 20. A different method of driving the rollers is clearly shown in FIG. 4, whereby it can be seen that the arrangement of the rollers has been slightly changed compared to the device of FIG.

FIG. 4 shows a processing device that substantially corresponds to the processing device 12 at the left end of FIG. However, the supply roller 18,
Another roller is additionally provided at 20 at a position for conveying the fiber flock from the tower feeder. In this example,
The roller 18 is made movable, and the roller 20
is kept in place. The shaft 66.1 of the movable supply roller 18.1 is also supported by two arms 72.1. In this example, the two arms 72.1 are not supported by the shaft of the opening roller, but by the shaft 90 of an additional roller 88. The pressing device 76.1 is in this case arranged on the left side of the tower feeder and is attached to the arm 72.1 in the same way as the arm 72 in the embodiment of FIG. For the sake of clarity, neither the spring nor the trip recording device are shown, but these elements can be utilized in the same way as in the embodiment of FIG. It is clear that a further pressing device 76.1 is also provided on the other end face of the roller 18.1.

The feed rollers 18.1 and 20.1 and additional additional rollers 88 are driven from a common motor 92. It consists of a chain 94 driven by a chain wheel 96 on the output shaft of this drive source motor 92. This chain 94
A chain wheel 98 provided on the front end surface of the roller 88, a chain wheel 100 provided on the front end surface of the roller 20.1, and a chain wheel 102 provided on the chain tensioning device 104 for tensioning the chain. Turn and run. The direction of rotation of the chain is indicated by arrow 106, the rotation of which results in a rotation of the supply roller 20.1 in the direction of rotation indicated by arrow 28 and of the additional roller 88 in the direction of rotation indicated by arrow 108. The supply roller 18.1 is driven by a further traveling chain 110, which is driven from a chain wheel 98 which is designed as a double chain wheel. Chain wheel 100, chain wheel 98 and chain wheel 1 on the front end face of supply roller 18.1
12 have the same diameter, so that the rotational speeds of these rollers are all equal. The opening roller 22.1 is driven by a further motor 114 and a circular chain 116.

From FIG. 4 it can be seen how the opening roller rotates inside the sheet metal guides 118, 120. At that time, the sheet metal guide 120 is indicated by the double-headed arrow 1
It is adjustable in 22 directions. Sheet 120 together with other attached sheets forms a guide channel 126 for the fiber flock. The special shape of this passageway 126 allows the fiber flock to fall slowly after being discharged from the area of the opening rollers, allowing the fiber flock to be conveyed without the generation of air currents that could interfere with sandwich formation on the transfer belt. Gently guide it onto the belt 34.

Reference numeral 128 designates a feed conduit, by means of which the fiber flocs are transported pneumatically from the outside to the tower feeder 14.1. Finally, 130 designates a computer which controls the rotational speed of the feed roller via a line 132 and which receives signals via a line 134 in a travel recording device integrated in the pressing device 76.1.

FIG. 5 shows another embodiment. In the apparatus of FIG. 5, the apparatus of supply rollers 18, 20 and opening roller 22 is formed corresponding to the apparatus of FIG. Therefore, the configuration of these components is not shown in detail in FIG. 5. However, in the device of FIG. 5 the motor 92.1 drives the feed roller 92.1 via a circular chain 136. This chain is tensioned via a tensioning device 104.1 and a tension wheel 102.1. Three chain wheels are arranged on the shaft of the opening roller, one of which is fixed to the opening roller. The other two chain wheels are freely rotatable on their shafts, but they are coupled to each other. One of the two chain wheels in combination is driven by a circulating chain 136, whereby the other chain wheel rotates the supply roller 20 via another circulating chain 138.

The second motor 114.1 is connected to the chain 14
0 drives an intermediate chain wheel 142, and this chain wheel 142 drives a circulating chain 146 through an associated chain wheel 144. This drive consists of a double chain wheel 148 and a circulating chain 1.
50 and a chain wheel fixed to the opening roller 22.

Furthermore, a treatment device is arranged above the tower feeder 14.2, which treatment device is used to maintain the filling height of the plurality of fiber flocs in the tower feeder 142 within predetermined limits. It will be done. For that purpose, the buffer space 154
A plurality of fiber flocks from the fiber flocs are sent to other processing equipment by four feed rollers 156, 158, 160, 162. These four supply rollers 156, 158, 160,
162 connects one motor 16 via a circular chain 166
4. The direction of rotation of each roller is indicated by a corresponding arrow. To obtain these directions of rotation, it is necessary to drive the feed roller 160 from the feed roller 162 via another chain 168. The circulating chain 166 is therefore only guided on a floating chain over the feed roller 160.

The treatment device 152 is substantially identical in construction to the treatment device disposed at the other end of the tower feeder 14.2, which has already been described. Two supply rollers 170, 17
2 is driven by a motor 174 via a circulating chain 176, which is connected to the tower feeder 1.
4.2 is arranged in substantially the same manner as the circular chain 136 at the other end. In this case as well, the second supply roller 172 is driven via another circular chain 178. The opening roller 180 is driven from the chain wheel 142 via another circulating chain 182. Therefore, the chain wheel 14
2 is formed as a double chain wheel.

The opening and closing of the switch of the processing device 152 is performed by two light barriers 184, which define the upper and lower limits of the filling height.
186. If the width of the tower feeder is relatively wide, measured perpendicular to the plane of the drawing,
In order to adjust the inclination of the upper surface position of the fiber flock filling, two light barriers may be provided at each of the upper and lower limit positions. The processing device 152 is switched on when the lower two light barriers 184 are not obstructed, while the processing device 152 is switched off when the upper two light barriers are obstructed.

However, depending on the number of light barriers in the tower feeder, different fiber quantities can be selected. In this case as well, the lowest light barrier indicates the empty condition of the tower feeder, and the highest light barrier indicates the prevention of overflow of the fiber flock.

FIG. 6 shows a pressing device 76 for the supply roller 20.
．． 2 is a schematic diagram. This pressing device is very similar to pressing device 76 of FIG. However, in the embodiment shown in FIG.
By clever geometry and placing a counterweight against one feed roller 20 acting as a weight, two feed rollers 18, at every position of the feed roller 20 within the range of movement, The configuration is such that a substantially constant pressing force is generated between 20 and 20 seconds. When the aperture angle α is maximum, that is, its longitudinal axis 204
When arm 72 is in the position indicated by line 206 in FIG. 6, the spring is more compressed than in the illustrated position, and the force exerted by the spring is at its maximum. On the other hand, the feed roller 20 at the maximum angle α exerts a greater compressive force on the spring 84 and therefore has greater leverage against the downwardly directed gravitational force. Counterweight 200, which applies a downward counterclockwise torque via arm 202, exerts an additional force in the direction of the force of spring 84 on the fiber flock between the two rollers 18,20. This additional force is at angular position 20
6 has a relatively small value. As a result, the pressing force exerted on the fiber flock between the two feed rollers 18, 20 is equal to the difference between the maximum spring force and the maximum geometric force of the feed roller 20 opposing this spring force at position 206. The values are almost the same.

On the other hand, when the arm 72 is at the smallest angle position (α=0), the force of the spring 84 is at its minimum value, and no counterforce due to the weight of the supply roller 20 acts on the spring 84. On the other hand, in order to maximize the lever length for vertical downward force, an additional weight 2
00 provides maximum torque on arm 72, adding to the force provided by spring 84. As a result, the force exerted on the fiber flock between the feed rollers 18, 20 is substantially the difference between the reduced force of the spring 84 and the similarly reduced gravity of the feed roller, plus the gravitational force of the additional weight. Therefore, by selecting the clever geometry and the force or compression ratio of the individual weights and springs, the force acting on the fiber flock between the two feed rollers 18, 20 can be made substantially constant over the entire range of angles α. You can stop.

The equations for this system can be easily derived by calculating the torque applied on arm 72 as a function of angle α, and inserting a zero at every angle α. From these equations, it is possible to determine the optimum values for the force or compression ratio of each weight and spring. Also, a value close to a constant compression force can be achieved without the additional weight 200. The arm 72 must normally be rotatable on the shaft 70 of the opening roller 22. If this is not the case, the pivot axis for the arm 72 must be selected as required so that the compressive force remains at least constant.

FIG. 7 shows another embodiment of the pressing device 76.3, in which case a gas pressing device is used. This gas pressing device is characterized by its ability to provide a constant compressive force over a relatively long stroke. The devices shown in FIGS. 6 and 7 arranged in front of the supply rollers 18, 20 may likewise be arranged correspondingly on the opposite side of the supply rollers 18, 20.

Next, FIG. 8 shows a hydraulic system for applying a constant compressive force. Here again, supply rollers 18, 20
is shown schematically. Instead of the spring-loaded pressing device in the previously described device, the pressing device 76.4 is here formed by two pistons in a cylinder device 210, 212, which cylinder device 210, 212 is located on the shaft of the feed roller. formed to act on mutually opposite ends;
In this case, for example, the piston rods 214, 216 of the two pistons of the cylinder arrangement are rotatable on the axis of the feed roller 20, and the cylinders 218, 220 of the two pistons of the cylinder arrangement are combined with the tower feed. It can rotate on the frame of the machine. In operation, a predetermined pressure is applied to both cylinders by the accumulator 222.

[0052] The accumulator 222 has a flexible membrane 222
It consists of a cylinder divided into two spaces 226, 228 by means of a cylinder, the space 226 being filled with a gas such as air, while the space 228 contains a hydraulic fluid. This space 228 is divided into two cylinders 218, 2
It is connected to twenty pressurized chambers via pipes 230, 232, and 234. Before the processing device is used, an initial pressure is built into the hydraulic device via pipe 236 as detailed below. However, as also discussed below, there is no return flow to pipe 236. Due to the pressure set by the piston in the cylinder arrangement 210, a predetermined force is exerted on the supply roller 20. If the position of the feed roller 20 changes due to the setting of the fiber flock, then the fluid from, for example, the cylinders 218, 220 enters the space 228 of the accumulator 222;
That results in an increase in the volume of this space and a compression of the gas volume 226. The pressure set in the device remains at least substantially constant when the gas volume is relatively large compared to the volume of fluid introduced, so that a constant compressive force is applied to the feed roller 20. The compressive force is then essentially independent of the actual position of the feed roller.

To operate the device, hydraulic fluid is drawn from container 240 and transferred directly to pressurized spaces 218, 220, 2 via check valve 242 and distribution valve 246.
A manual pump 238 is provided in this embodiment for pushing into 28. The pressure generated in these pressurized spaces can be read using a manometer. Safety valve 250 ensures that the pressure developed by pump 238 does not exceed a maximum value, such as if the check valve is inoperable. Other safety valves to prevent excessive pressure may be incorporated into the fluid pressurization device. If valve 250 or valve 252 performs pressure relief due to pressure build-up, the fluid that serves to relieve the pressure is transferred to container 24 via pipe 254.
Returned to 0.

[0054] Pressure is combined with a processing device 8
A distribution valve 246 is formed so that pressure is applied to the different tower feeders A to H as a whole. For all tower feeders, two pistons are provided in the cylinder arrangement 210, 212, as well as an accumulator 222 and appropriate pipes. A separate pushing device can be selected downstream of the distribution valve 246. After the pressure is established in the tower feeder E in the previous embodiment E, the distribution valve is then turned to the shut-off position, thereby causing the pump 238
The connection between and the separate pressurization system is interrupted. It is clear from this example that a separate safety valve must be provided for each pressurizing device.

It is also possible to operate the device with a small pump 238 that operates constantly. Alternatively, the safety valve 252 may be configured to maintain a constant pressure. It can be provided in each individual tower type feeder,
Alternatively, all tower feeders may be connected to one pipe at the same time. In this case, only one safety valve 252 is activated. In such cases, pressure regulating valves are required for all tower feeders. In the latter case, tower type feeder A~
H is connected to pump 238 via a multidirectional distributor.

FIG. 9 shows an embodiment very similar to that of FIG. However, in this case, the supply roller 18 is not specifically driven, but is simply arranged so that it can rotate freely. In this embodiment, an appropriate frictional force is applied to the supply roller 18 by the fiber flock flow, especially when the surface of the supply roller 18 is not smooth but has a finished surface that increases the coefficient of friction. Based on knowledge. The frictional force at that time is the speed of the fiber flock flow, that is, the supply roller 2
It is absolutely sufficient to drive the feed roller with a surface speed corresponding to a surface speed of zero.

Apart from this change, the layout of the embodiment of FIG. 9 corresponds completely to the embodiment according to FIG. Omitted. Suffice it to point out that the position of the shaft 66 of the supply roller 18 is fixed and freely rotatable, while the supply roller 20 is movable towards the supply roller 18 and driven in the direction of the arrow 28. . However, it is also possible to conversely configure the feed roller 18 to be driven while the feed roller 20 is free to rotate.

In the embodiment shown in FIG.
The device of the supply roller 20 which is driven and rotated is the same as the embodiment shown in FIG. The same reference numerals are therefore used for these parts. However, the feed roller 18 is replaced by a fixed slide 300, which forms with the feed roller 20 a feed gap 302 having a minimum width at a position 304.

In the embodiment shown in FIG.
is guided by a circulating belt 306 guided by two guide rollers 308, 310. In this example, the upper guide roller 308 is driven on the shaft 312 in the direction of arrow 314 and its speed is equal to the speed of the belt 3 in the direction of arrow 316.
06 is chosen to be equal to the surface speed of the rotating supply roller 20. The arrangement of the rotating supply roller 20 and the opening roller 22 corresponds to that of FIG. 2, and therefore the same reference numerals are used and a detailed description is omitted for the sake of brevity.

In the case of a driven circulating belt 306, it is not necessary to provide a guide roll 310 in the lowest region of the loop formed by the belt. Alternatively, for example, the belt may be guided by a triangular guide member 308. However, in this example, it is not necessary to drive the belt if it is moved by the frictional force provided by the fiber flock flow. In this case, it is preferable to provide a freely rotating guide roller 310 on the shaft 320, and at the same time a similarly freely rotating guide roller 308, so that the friction that impedes the free movement of the circulating belt can be kept as low as possible. . The position of the minimum width 304 of the supply roller gap 301 in this example is located at the lower end of the circulating belt.

The embodiment shown in FIG. 12 shows a driven feed roller 20.2 and a fixed feed trough member 322. The supply roller 20.2 rotates on the axis 68.2 in the direction of the arrow 28.2. This shaft 68.2 is supported at both ends in guide members 72.2 (only one of which is shown in FIG. 12). This guide member 72.2 is also hinged to the shaft 34 on the upper end of the fixed feed trough member 322. Feed gap 302 in this example has a minimum width at location 304. This mounting of the feed roller 20.2 makes it possible to vary the minimum width as much as possible by a rocking movement of the guide corresponding to the arrow 74.2. The pressing device 76.2 is constructed correspondingly to the device of FIG. However, the pressing device 76.2 is pressed from above by the guide member 72.
2 and at the same time press the supply roller 28.2 in the direction of the supply trough member 322.

In the embodiment shown in FIG.
and supply roller 20 are both replaced by circulating belts 306, 326. Two guide rollers 308, 31
FIG. 11 shows the arrangement of the circulating belt 306 that is placed around the
corresponds exactly to the arrangement of the corresponding circulating belt 306 and is therefore provided with the same reference numerals and will not be described in detail. Circulating belt 326 is arranged in substantially the same manner. That is, the circulating belt 326 runs over an upper guide roller 328 which is driven and rotates on an axle 330 and is guided via a lower guide roller 332 which is arranged to rotate freely on an axle 334. The pressing devices are applied on both ends of the shaft 334, which is arranged in a manner corresponding to the embodiments in the previous figures. However, in order to ensure that the width of the gap at the narrowest position 304 of the feed gap 302 remains the same over the entire axial length of the guide roller 310 or guide roller 332, the part 82.3 of the pressing device is made of a rigid rod. The embodiment shown in FIG. 13 has additional means connected to both ends of the shaft 36 consisting of. The shaft 36 made of a rigid rod may also be provided in other embodiments. The shaft 330 of guide roller 338 and the shaft 334 of guide roller 332 are rotatably mounted on a common carrier (not shown) on shaft 330.

In this embodiment both itinerant belts are driven at the same surface speed or the itinerant belt 306
Alternatively, one of the circulating belts 326 may be driven to allow the other belts to rotate freely. In the case of a freely circulating belt, it is advantageous if a freely rotating roller is provided in the lower guiding position. However, when using a driven belt, the guide members 318, 31
9 can be provided, in which case the guide element 318 is preferably fixed and the guide element 338 is arranged movably. In this case, the movement of the guide roll 338 is limited by a rocking movement on the shaft 330. Also in this embodiment, the minimum width 304 changes during operation, and changes in this spacing can be accounted for by controlling the surface speed of the driven circulating belt.

The embodiment shown in FIG. 14 is a further development of the embodiment shown in FIG. The rotating supply roller 20 in this case is replaced by a circulating belt 326 corresponding to the circulating belt of FIG. Since the arrangement of the circulating belt 326 has been explained in detail on the basis of FIG. 13, a description of the circulating belt 326, which has the same purpose, will be omitted here. It should be noted, however, that the circulating belt 326 in this embodiment needs to be a driven belt. Also in this embodiment, the width 304 changes during operation, and changes in this spacing can be accounted for by controlling the surface speed of the circulating belt 326. Its traveling speed is
As in all other embodiments in which circulating belts of this type are used, this is naturally determined by the rotational speed of the associated drive guide roller, which in this embodiment is 328.

FIG. 15 shows that the supply roller 20.5 is indicated by the arrow 28.
An embodiment is shown which is driven on a fixed shaft 68.5 in the direction of 5. The feed roller 18 is replaced in this embodiment by a flexible plate 370. i.e. plate 370
The pressing device 76.5 presses the fiber flock in the direction of the arrow 372, and the guide members 374, 376 arranged at the upper and lower ends of the plate 370 ensure that the plate 370 follows only the direction of the arrow 372. to move to. Further, the pressing device 7 is a measuring device that transmits a signal to notify a change in the minimum width interval 304 of the supply gap 302.
6.5. Instead of providing the flexible plate 370 in this form, the plate itself can be formed as a leaf spring. In this case, the distance 304 that occurs during operation
Another measurement feeler is required to determine the change in . Finally, FIG. 16 shows a further modification of the embodiment according to FIG. That is, the supply roller 18.4 and the supply roller 20.4 which achieve the desired production volume m'nom have a fixed spacing from each other, and the supply rollers 18.4, 2
0.4 has axes 66.4, 68.4 whose positions are fixed, respectively, and predetermined arrows 26.4, 2.
Rotate in the direction of rotation according to 8.4. At that time, the opening roller 2
2 similarly rotates on an axis 70 in a fixed position. The ends of the shaft 68.4 of the supply roller 20.4, which rotates in the aforementioned direction, are supported by two approximately triangular plates 340 (only one of which is shown in FIG. 16); The plates are connected to each other by tie rods (not shown). The two plates 340 are double-headed arrows 344
As shown, it is arranged to be swingable on a fixed shaft 342. However, in operation, the fixed position of the triangular plate 340 and thus the position of the feed roller axis 68.4 can be selected. This takes place via a threaded spindle 346 that is introduced through a fixing part 348 with an internal thread. A manual wheel 350, which can also be replaced by a motor drive, turns the threaded spindle to the extent possible and thereby makes it possible to determine the position of the triangular plate 340. When a corresponding spindle arrangement is provided for a second spindle (not shown), the drives of the two spindles must be coordinated with each other, which means that the circulating belt 352 is arranged relative to the wheel 350. This can be achieved by

At the end of each threaded spindle 346 is a yoke 354 with legs 356 of yoke 354.
, 358 are arranged on both sides of the tongue-shaped portion 360 of the triangular plate 340 to be assembled. Dynamometer pressure cell 36
2,364 are the respective legs 356, 358 and tongue 36
0, and the pressure cell 362 is connected to the computer via electrical leads (not shown). In operation, two feed rollers feed the fiber flock through the feed nip 302 and the minimum width position 304. A force P acts on the supply roller 20.4 which attempts to rotate the triangular plate on the axis 342. No actual rotational movement occurs. This is because rotational movement is impeded by the spindle-yoke arrangement. Dynamometer pressure cells 362, 364 allow the magnitude of the force to be determined by a computer that also takes into account geometrical conditions.

This force variation corresponds to a variation in the density of the fiber flock stream at position 304, and depends on the rotational speed of the feed roller 20.4 and as long as the feed roller 18.4 is driven or alternately driven. , if necessary, is processed by the computer for controlling the rotational speed of the feed roller 18.4, so that the desired mass flow m'no
m is maintained. If it is desired to change the output from the tower feeder, the change can be made exclusively by changing the rotational speed of the feed roller 20.4 and, if necessary, the rotational speed of the feed roller 1.
8.4 is carried out exclusively by changing the rotational speed. However, for a wider range of adjustment, a minimum width of 30
4 can be varied or set using the spindle 346, so that the change in the rotational speed of the feed roller can be kept within predetermined limits independently of the predetermined mass flow m′nom .

Finally, in the embodiment of FIG. 16, the gap 304 is kept constant and the magnitude of the force attempting to separate the two supply rollers from each other can be measured instead of using the pressing device described above. It is similar for all other embodiments.

From FIG. 9 to FIG. 14, the pressing device 76
, 76.3, 76.4 are shown similarly to the embodiment of FIG. It should be understood that these pressing devices preferably include gas springs or hydraulic devices in order to keep the initial pressing force constant regardless of changes in the minimum width 304. Also, the geometry can be adjusted so that a compensating force is generated using a conventional compression spring to generate a force, a compensating force that does not change the initial pressing force by adjusting only one feeder, or a compensating force that simply reduces the dimension. Other embodiments that partially select the chemical configuration can be used.

It is clear that in all embodiments in which various means are provided in front of the feeding device or the opening roller, plates limiting the amount of fiber flock can also be provided on the sides of the feeding gap.

[Brief explanation of the drawing]

1 shows a schematic side view of a mixing device according to the invention equipped with three processing devices; FIG.

FIG. 2 is a perspective view showing two supply rollers and a fiber opening roller of the processing apparatus according to the present invention.

FIG. 3 is a graph explaining the control method of the present invention.

FIG. 4 shows a detailed side view of a first embodiment of a processing device according to the invention.

FIG. 5 is a side view of another processing device according to the invention.

FIG. 6 is a schematic illustration of an embodiment of a pressing device.

FIG. 7 is a schematic representation of another embodiment of the pressing device.

FIG. 8 is a schematic illustration of yet another embodiment of the pressing device.

FIG. 9 is a side view of the improved embodiment of the device shown in FIG. 2;

FIG. 10 is a side view similar to FIG. 9 showing another embodiment in which one of the supply rollers is replaced by a slide member.

FIG. 11 is a side view similar to FIG. 9 showing another embodiment in which one of the supply rollers is replaced by an endless belt.

FIG. 12 is a side view similar to FIG. 9 showing another embodiment in which one of the supply rollers is replaced by a supply gutter.

13 is a side view of another embodiment similar to FIG. 2 in which two endless belts are used; FIG.

FIG. 14 is a side view similar to FIG. 13 of an improved embodiment in which one of the two endless belts is replaced by a slide member.

FIG. 15 is a side view of an improved embodiment of the device shown in FIG. 2;

16 is a side view of an embodiment similar to that of FIGS. 2 and 9, in which the two feed rollers are kept at a constant distance from each other; FIG.

[Explanation of symbols]

16... Tower type feeder 18, 20... Supply roller (supply device) 22...Opening roller 62...Fiber flock 76...Pushing device 130...computer x...supply gap

Claims (11)

[Claims] 1. A treatment method, preferably in which a determinable amount of fiber floc is discharged per unit time using two feeders arranged below a tower feeder to form a feed gap. a fiber opening roller is disposed below the two supply devices, the supply device has any of the configurations a to f below, and a. a rotating supply roller and a slide opposite the roller; b. a rotating supply roller and a driven or free-running circulating endless belt opposite the roller; c. two freely moving circulating endless belts facing each other, at least one belt being driven and the other belt either freely rotating or being driven; d. a driven endless belt and a slide facing the belt, e
．． a rotating feed roller and a freely moving rotating feed roller disposed opposite the roller; f. a rotating supply roller and a supply gutter member facing the roller;
In all configurations of the feeding device, the feeding gap converges to a minimum width, and at least one of the two feeding devices is pressed against the other feeding device, and the spacing between the two feeding devices is is movable under pressure of the fiber flock from the other feeding device to change the minimum width (x) of the feeding gap, and the minimum width (x) between the two feeding devices is A small width or a value proportional to said minimum width is determined and the surface speed (u) of the driven feed device or both feed devices
for discharging a determinable amount of fiber floc per unit time, characterized in that the product of the width between the feeding devices and the surface velocity is kept constant at least at its average value. Processing method. 2. The product (u x) of the surface velocity (u) and the minimum width (x) can be determined in advance at a time interval (t2).
−t1 ) over the instantaneous production (m
′) is formed by However, the next value of instantaneous production (m′) is its nominal value (
2. The processing method according to claim 1, wherein the rotational speed is controlled so as to approximate the rotational speed m'nom. [Equation 1] In the formula, K represents a constant. 3. The processing method according to claim 2, wherein the surface velocity (u) in a certain time interval is controlled to a constant value in that time interval. 4. Two feeding devices arranged below the tower feeding machine to form a feeding gap are used, and preferably a fiber opening roller is arranged below the two feeding devices. In a processing device for discharging a determinable amount of fiber flock per unit time, the feeding device comprises the following a to
f, having any of the following configurations: a. a rotating supply roller and a slide opposite the roller; b. a rotating supply roller and a driven or free-running circulating endless belt opposite the roller; c. Two freely moving faces facing each other
two circulating endless belts, at least one of which is driven and the other belt is either freely rotating or driven; d. a driven endless belt and a slide opposite the belt; e. a rotating feed roller and a freely moving rotating feed roller disposed opposite the roller; f. a rotating supply roller and a supply gutter member facing the roller;
In all of the configurations of the feeding devices of ~f, the feeding gap converges to a minimum width, and a pressing device is provided for pressing in advance at least one of the two feeding devices in the direction of the other feeding device. and at least one of the two feeding devices is movable from the other feeding device under the pressure of the fiber flock, and during the operation of moving the fiber flock, the distance between the two feeding devices is set to a minimum distance position. or a value proportional to said minimum interval is provided, and is determined to obtain control of the instantaneous production volume (m) to a predetermined nominal value (m'nom). A processing device for discharging a determinable amount of fiber flocs per unit time, characterized in that a control device is provided for controlling the surface velocity (u) of the movable feeding device on the basis of the distance (x) . 5. A rotating supply roller and a slide arranged to form a supply gap between the supply roller, the slide being formed as a spring-like plate, the spring-like slide being flexible. 5. Processing device according to claim 4, characterized in that it has a flexible structure and is movable from a rotating but fixed position supply roller. 6. characterized in that the pressing device is configured as at least one spring or tension element, the force of which remains substantially constant over a predetermined displacement distance; 5. The processing device according to claim 4. 7. Processing device according to claim 4, characterized in that the pressing device is formed by at least one fluid pressure device. 8. The pressing device is formed by at least one spring, at least one spring at least partially compensating for a reduction in the pressing force caused by the reduced spacing between the two feeding devices. 5. Processing device according to claim 4, characterized in that a counterweight is provided, said counterweight or at least a part thereof being formed by the feeding device itself by suitable suspension structure of the feeding device. 9. The pressing device is a hydraulic device, and the hydraulic device includes a displacement device actuated by movement of one of two supply devices and an accumulator connected to the displacement device, or an accumulator in the pressing device. 5. A processing apparatus as claimed in claim 4, characterized in that it is any one of a substantially constant pressure compensating device formed in a. 10. A method for producing fiber flocs at a determinable rate per unit time using two feeding devices disposed below a tower feeding device, rotating in opposite directions and forming a feeding gap between them. In the processing method for discharging a quantity, preferably a fiber opening roller is disposed below the two supply devices, the supply device has any of the following configurations a to g, and a. two rotating supply rollers facing each other, b
．． a rotating supply roller and a slide opposite the roller; c. a driven feed roller and a driven or free-running circulating endless belt opposite the roller;
d. two freely moving circulating endless belts facing each other, at least one belt being driven and the other belt being either free to rotate or driven;
circular belts, e. a driven endless belt and a slide opposite the belt; f. a rotating supply roller and a freely moving rotating supply roller disposed opposite the roller; g. A rotating supply roller and a supply gutter member facing the roller, instantaneously measuring a force (P) or a value proportional to the force that moves the two supply devices facing each other apart, The relative positions of the two feeders are held substantially constant and the surface velocity of the driven feeder is determined by the product of surface velocity and force (
A treatment method for discharging a determinable amount of fiber floc per unit time, which is controlled such that u.P) is at least constant as an average value. 11. A treatment device for discharging a determinable amount of fiber flocs per unit time using two feed devices arranged below a tower feeder to form a feed gap between them. Preferably, a fiber opening roller is disposed below the two supply devices, and the supply device has any of the following configurations a. two rotating supply rollers facing each other; b. a rotating supply roller and a slide opposite the roller; c. a driven feed roller and a driven or free-running circulating endless belt opposite the roller; d. two freely moving circulating endless belts facing each other, at least one belt being driven and the other belt either freely rotating or being driven; e. a driven endless belt and a slide opposite the belt; f. a rotating feed roller and a freely moving rotating feed roller disposed opposite the roller; g. A rotating supply roller and a supply gutter member facing the roller, in a supply device having all the configurations a to g above, the supply gap converges to the minimum width and for the selected production (m'nom). The relative positions of the two feeding devices are kept at least substantially constant with respect to each other, and a dynamometer is provided to measure the force (P) tending to separate the two feeding devices from each other, and the instantaneous production rate is determined. (m′) with a predetermined nominal value (m′n
om) with the aim of obtaining determined power for
A processing device for discharging a determinable amount of fiber flock per unit time, which is provided with a control device for controlling the speed of the driven feed device.